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Amphipathic block copolymer containing polyisobutylene and polycation and preparation thereof

A technology of polyisobutylene block and amphiphilic block, which is applied in the field of amphiphilic block copolymer and its preparation, can solve the problems of environmental hazards, residual toxicity, and short disinfection time, and achieve the effect of expanding the scope of application

Inactive Publication Date: 2012-03-28
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the fungicides used for water body or medical disinfection are small molecular substances. Small molecule fungicides will not only leave residual poison and cause harm to the environment, but also have a short disinfection time. Compared with small molecule fungicides, polymer antibacterial agents have antibacterial Volatility and anti-decomposition stability, long disinfection time and small residual toxicity, etc., more importantly, because the antibacterial group is concentrated on the macromolecular chain, the polymer antibacterial agent has a strong antibacterial ability, especially the polycationic antibacterial agent (polyquaternium salt or polyquaternium phosphonium salt), the high positive charge density and good accessibility (hydrophilicity) on the macromolecular chain make it have excellent antibacterial activity and can be used in various disinfection processes

Method used

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  • Amphipathic block copolymer containing polyisobutylene and polycation and preparation thereof
  • Amphipathic block copolymer containing polyisobutylene and polycation and preparation thereof
  • Amphipathic block copolymer containing polyisobutylene and polycation and preparation thereof

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Embodiment 1

[0067] Embodiment one: PIB-b-PDMAEMA 21 preparation method

[0068] (1) Preparation of polyisobutylene PIB-OH (HTPIB) containing hydroxyl group (-OH) at the end: under the condition of -5~0℃ ice-water bath, with anhydrous tetrahydrofuran as solvent, add a certain amount of substance into the three-necked flask Sodium borohydride (NaBH 4 ). Boron trifluoride-diethyl ether [(C 2 h 5 O) 2 ·BF 3 ] The solution was reacted for 1.5 hours; then a highly active polyisobutylene (HRPIB) solution dissolved in anhydrous tetrahydrofuran was added dropwise and reacted for 20 hours. Add NaOH solution dropwise, adjust the pH of the system to about 12, slowly add 30% H 2 o 2 solution, reacted for 7 hours. The organic layer was obtained by extraction with ether, and was washed with anhydrous magnesium sulfate (MgSO 4 ) after drying and rotary evaporation to remove the solvent, and the resulting product was dried in a vacuum oven at room temperature for 24 hours to obtain polyisobutyle...

Embodiment 2

[0075] Figure 6 Shown is the thermogravimetric analysis curve of the PIB-b-PDMAEMA diblock copolymer, there are two thermal decomposition temperatures in the curve, this is because: the block copolymer due to the formation of polyisobutylene and poly[methacrylic acid-2-( Two-stage weight loss curves appear in the respective micro-regions, thus, it can also be proved that the diblock copolymer PIB-b-PDMAEMA has been successfully synthesized. 21 . Embodiment 2: PIB-b-PDMAEMA 20 preparation method

[0076] (1) Preparation of polyisobutylene PIB-OH (HTPIB) containing hydroxyl group (-OH) at the end: same as Example 1.

[0077] (2) Preparation of KH: same as Example 1.

[0078] (3) Preparation of macroinitiator: same as embodiment one.

[0079] (4) Polymerization reaction: Then move the reaction bottle into a constant temperature oil bath at 25°C, and add the monomer 2-(dimethylamino)ethyl methacrylate (DMAEMA) with a dry syringe, and the molar ratio of the macroinitiator to ...

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Abstract

The invention belongs to the field of organic high molecular compounds, and discloses an amphipathic block copolymer containing polyisobutylene and polycation and a preparation method thereof. A chemical formula of the amphipathic block copolymer is shown in the specification; and in the formula, x is equal to 18-60, y is equal to 10-120, and R is one of -CH3, -CH2CH3 and -CH(CH3)2. The inventionprovides an amphipathic copolymer simultaneously containing lipophilic polyisobutylene segment and hydrophilic polycation segment with stimulative responsibility, so that the application range of theblock copolymer containing the polyisobutylene is expanded, and the copolymer can be applied to a heterogeneous system. The method has simple synthesis steps; the defect that the conventional anionicpolymerization reaction is required to be performed under severe conditions of extremely low temperature, high vacuum and the like is overcome; and the method is easy to control, can be performed at room temperature, and has the advantages of high reaction activity, high reaction speed, conversion rate of close to 100 percent, controllable molecular weight, pure product and nearly no need of a post-treatment process.

Description

technical field [0001] The invention belongs to the field of organic polymer compounds, and relates to an amphiphilic block copolymer containing polyisobutylene and polycation and its preparation. Background technique [0002] Polyisobutylene (PIB) is a cationic polymerization product of isobutylene (butene). According to the molecular weight, it can be roughly divided into three grades of high, medium and low molecular weight. Colorless polyisobutylene is odorless, non-toxic, non-flammable, good chemical stability, and acid resistance. , Alkali resistance, water resistance, cold resistance, heat resistance, aging resistance, ozone resistance, oxygen resistance, ultraviolet resistance, its use is very wide. Highly reactive polyisobutylene (HRPIB; Highly Reactive-Polyisobutylene) is a low-molecular-weight polyisobutylene with a polyisobutylene α-terminal double bond content greater than 85%. Its main feature is that it can produce polyisobutylene ashless dispersants (internal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F293/00C08F210/10C08F220/34C08F110/10C08F8/44C08F8/06
Inventor 倪沛红王怀超张明祖周明星朱秀林
Owner SUZHOU UNIV
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